What should I do to display the diff of even a simple merge commit?

Hi list,

I'm performing many merges between developpers branches these days, most of them not yielding into conflicts. (understand: simple merges)

All is good, but sometimes, I would like to really like what has been changed.

As I do not systematically do this "git merge --no-commit --stat <list_to_merge>" and then fire "git gui" to inspect the diffs before the real commit, I'm wondering: how could I do this using some plumbing ?

Right now, I've tried the obvious git log -c -p, git show -u --cc, but since the merge are simple merges, I cannot get any diff output. I believe this is by construction.

Any hints ?

Thanks in advance.